I replaced all my internal wiring with Duelund DCA oil cotton insulated wire in 10 awg for the bass drivers and 16 awg for everything else. I did this while I was upgrading the crossovers.
A dirty little secret is that almost evey speaker saves money on crossover components since they are inside and invisble. I’ve seen speakers that put their crossovers on the back under plexiglass to brag about how good their components were and they were merely mediocre. Most have plain old sand cast resistors like they used to sell in radioshack for 15c. This is a fertile ground for upgrade.
Those suggesting that you should call the OEM and ask should put yourself in the shoes of the OEM. Most will say it is not necessary as to say otherwise admits their product can be improved. Many will worry you’ll break something and then ask them to fix it since they approved the modification. YOu’ll almost always get a negative reply. which is good if you don’t really want to do it anyway
I got so many negative comments when I upgraded my crossovers that I think many people are just hoping crossover upgrades don't become a trend because then they will have to do it.
Jerry